/* ===================================
   Header — 固定ヘッダー＋ハンバーガーメニュー
   =================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: var(--color-white);
  box-shadow: 0 2px 8px var(--color-shadow);
  z-index: 1000;
  transition: box-shadow 0.3s ease;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- ロゴ --- */
.header__logo a {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header__logo img {
  height: 40px;
  width: auto;
}

.header__logo-text {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  white-space: nowrap;
}

/* --- PC ナビゲーション --- */
.header__nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.header__nav-link {
  padding: 8px 14px;
  font-size: 0.9375rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  border-radius: 6px;
  transition: background-color 0.3s ease, color 0.3s ease;
  white-space: nowrap;
}

.header__nav-link:hover {
  background-color: var(--color-bg);
  color: var(--color-primary);
  opacity: 1;
}

/* --- PC 右側 --- */
.header__actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header__phone {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9375rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  white-space: nowrap;
}

.header__phone-icon {
  font-size: 1.125rem;
}

.header__cta {
  padding: 12px 24px;
  font-size: 0.9375rem;
}

/* --- ハンバーガーボタン --- */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger__line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
  transition: all 0.3s ease;
}

.hamburger__line + .hamburger__line {
  margin-top: 6px;
}

/* ハンバーガー開状態 */
.hamburger.is-active .hamburger__line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger.is-active .hamburger__line:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active .hamburger__line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* --- モバイルメニュー --- */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-height-sp);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-height-sp));
  background-color: var(--color-white);
  z-index: 999;
  overflow-y: auto;
  padding: 24px;
  transform: translateX(100%);
  transition: transform 0.3s ease;
}

.mobile-menu.is-open {
  transform: translateX(0);
}

.mobile-menu__link {
  display: block;
  padding: 16px 0;
  font-size: 1.0625rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu__link:hover {
  color: var(--color-primary);
  opacity: 1;
}

.mobile-menu__phone {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
  padding: 16px;
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  border-radius: 8px;
}

.mobile-menu__cta {
  display: flex;
  margin-top: 16px;
}

/* body padding for fixed header */
.has-header {
  padding-top: var(--header-height);
}

/* --- レスポンシブ --- */
@media (max-width: 768px) {
  .header {
    height: var(--header-height-sp);
  }

  .header__inner {
    padding: 0 16px;
  }

  .header__logo img {
    height: 32px;
  }

  .header__logo-text {
    font-size: 1.0625rem;
  }

  .header__nav,
  .header__actions {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-menu {
    display: block;
  }

  .has-header {
    padding-top: var(--header-height-sp);
  }
}